CRAS: test_client - Display stream type in audio thread info.

BUG=chromium:643039
TEST=Start playback and verify the stream type is displayed in
     cras_test_client --dump_a output.

Change-Id: I4eb0d9835260a01fc7c07b56e19b41ffbbd61131
Reviewed-on: https://chromium-review.googlesource.com/479515
Commit-Ready: Chinyue Chen <chinyue@chromium.org>
Tested-by: Chinyue Chen <chinyue@chromium.org>
Reviewed-by: Chinyue Chen <chinyue@chromium.org>
3 files changed